Dodge 2500 5.9 Cummins Weak CP3 Pump -- Starts Hard When Sitting Overnight

This a typical symptom of a weak CP3 Pumps found on all the 03+ Dodge Cummins Trucks. This truck has almost 350,000 miles on it and it has the original CP3 pump. When this truck sits for a period of time, usually over night the truck will start hard in the morning. Once ran the truck will start and run fine all day. Pretty much the same symptoms of a weak VP44 Pump found on all the 98.5-02 Dodge 2500, 3500 Trucks.

[korn]

You may be right on this but there are other parts that can make it hard to start. Leaky injector, pressure valve etc.

[chadharrison]

My problem was the in-tank fuel pump. When my truck would not start I would have do the following procedure 3 times then the truck would start up and run. Bump the starter let the failing pump prime the fuel bowl allow approximately 45 sec. turn key off and repeat

[maintenancemadeonabudget]

I'm having this exact issue now on my 03 I will check the tubes first and see if their leaking but sounds like it's the cp3

[elitetrucking]

I had a similar problem on my cummins 5.9 and the problem was the water drain valve on the fuel filter reservoir

[emiliocasarez]

I had the same problem on my 2006 Dodge Ram 2500 it ended up being the FCA (Fuel Control actuator) I was ready to buy new injectors and everything but it ended up being this little $200 dollar part.

[ikill_yt]

My was just the batterys and did the same thing

[joegambrel]

i changed fuel filter in my 2003 dodge ram cummins 5.9 now im not getting fuel from my lift pump to my filter bowl

[sicsempertyrannis]

I have an 07 and my cp3 is going out but mine will start fine cold. But at temp if it sits for 10mins or so, Hard start. If I poor Luke warm water on the cp3 and cool it down fire's right up. Does anyone know someone that can rebuild my pump into a 10.6 mm stroker. I would rather have mine built than buy some other repop.

[bucksmith]

Every vehicle runs and runs and runs as long as you put new parts on it! Hahaha you guys and your cummins.

[joshthuen]

did it end up actually being the cp3? have the same exact issues and everyone is telling me injectors but i dont have the $3k to blow at the moment. just wondering if the cp3 was the problem on his!

[johnkauffman]

How do you know it’s not injectors high feedback from bad injector or two?